| IPR007066 | RNA polymerase Rpb1, domain 3 | Domain |
| IPR007081 | RNA polymerase Rpb1, domain 5 | Domain |
| IPR007073 | RNA polymerase Rpb1, domain 7 | Domain |
| IPR045867 | DNA-directed RNA polymerase, subunit beta-prime | Family |
| IPR042102 | RNA polymerase Rpb1, domain 3 superfamily | Homologous Superfamily |
| IPR007083 | RNA polymerase Rpb1, domain 4 | Domain |
| IPR038593 | RNA polymerase Rpb1, domain 7 superfamily | Homologous Superfamily |
| IPR000722 | RNA polymerase, alpha subunit | Domain |
| IPR044893 | RNA polymerase Rpb1, clamp domain superfamily | Homologous Superfamily |
| IPR038120 | RNA polymerase Rpb1, funnel domain superfamily | Homologous Superfamily |
| IPR006592 | RNA polymerase, N-terminal | Domain |
| IPR007080 | RNA polymerase Rpb1, domain 1 | Domain |
| IPR007642 | RNA polymerase Rpb2, domain 2 | Domain |
| IPR015712 | DNA-directed RNA polymerase, subunit 2 | Family |
| IPR037033 | DNA-directed RNA polymerase, subunit 2, hybrid-binding domain superfamily | Homologous Superfamily |
| IPR037034 | RNA polymerase Rpb2, domain 2 superfamily | Homologous Superfamily |
| IPR007120 | DNA-directed RNA polymerase, subunit 2, hybrid-binding domain | Domain |
| IPR007121 | RNA polymerase, beta subunit, conserved site | Conserved Site |
| IPR007645 | RNA polymerase Rpb2, domain 3 | Domain |
| IPR007646 | RNA polymerase Rpb2, domain 4 | Domain |
| IPR014724 | RNA polymerase Rpb2, OB-fold | Homologous Superfamily |
| IPR007644 | RNA polymerase, beta subunit, protrusion | Domain |
| IPR007641 | RNA polymerase Rpb2, domain 7 | Domain |
| IPR036643 | DNA-directed RNA polymerase, insert domain superfamily | Homologous Superfamily |
| IPR009025 | DNA-directed RNA polymerase, RBP11-like dimerisation domain | Domain |
| IPR036603 | RNA polymerase, RBP11-like subunit | Homologous Superfamily |
| IPR035913 | RPB5-like RNA polymerase subunit superfamily | Homologous Superfamily |
| IPR000783 | RNA polymerase, subunit H/Rpb5 C-terminal | Domain |
| IPR020708 | DNA-directed RNA polymerase, 14-18kDa subunit, conserved site | Conserved Site |
| IPR036161 | RPB6/omega subunit-like superfamily | Homologous Superfamily |
| IPR006110 | RNA polymerase, subunit omega/Rpo6/RPB6 | Family |
| IPR006111 | Archaeal Rpo6/eukaryotic RPB6 RNA polymerase subunit | Family |
| IPR023580 | RNA polymerase subunit RPB10 | Homologous Superfamily |
| IPR020789 | RNA polymerases, subunit N, zinc binding site | Binding Site |
| IPR000268 | DNA-directed RNA polymerase subunit RPABC5/Rpb10 | Family |